Device for treating fabrics by means of a circulating bath



April 1.1, 1933.

DEVICE FOR TREATING FABRICS BY MEANS 0F A CIRGLATING BATH n J. ANNlcQ`1,903,585

Filed June 19. 1931 All ` Invenl'o/' jasga JQQUTCH y bhne Pm Apr.' 171,1933 UNITED sm'ljasl Joslin uitroepen aniram mami nnvrcn mamma ranarcsBY mns or a cracumma aan:

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' My present invention .has for its object l to provide lan improveddevice' or vat for treating fabrics inpieces by means of acirculatingbath, for instance for dyeing, bleachpreure of the bath the spool offabric im pregnated with liquid was subject to certain distortions inopposite directions according to the direction of circulation. If thebath is 5 circulating from outside to inside of the spool,

the latter has` tendency to become contracted:

the ends of the spool will be curved inward- 1y and the major part ofthe bath then passes between said ends and the caps which embrace thespool. In the opposite direction of circulation the spool hastendency tobecome wider and to be curved towards the centre.

Heretofore spool cores have already been known for balancing orcompensating the effects of such expansion and contraction of thespools. According to a preferred embodiment said spool core is formed ofa coil spring,- covered by a practically continuous surface formed bytressing or platting a lace, textile, metallic or other thread or fabricaround the successive windings of the spring. Such cofre secures auniform expansion .and cons traction of the spool, that is the oppositeplane faces of the spool will always remain substantially parallel to'each other without forming undesirable passages for the bath. l

If it is desired to treat `fabrics in pieces `wound in the -shape ofspools, the eiect of such a spool core will however bek insucient -ashereinafter set forth. In said treatment the thick spools are placedupon a supporting plate and held in a'tightened condition` prior to thetreatment thereof by means of an upper late. Now if under the action ofthe bath t e impregnated spool contracts it-v self,` it `ai'illenablethe liquid to pass between said plate and the uppersurface of the spool,

whichlobjection will pljecisely be avodedby my present', invention. "Ifthe upper cap or plate is left free to be moved vertically, liquidpassages will be undoubtedly formed, upon the raising of said cap underthel actionof the expansion of the spool', between the late and thespool, the regulatin action o the velastic core being not perfect yuniform.

According to mypresent invention, I combine with an elastic spool coreof the type described a cap or upper plate which is' rovided on its sidein contact with the spoo of fabric with'projecting ribs thereby pre--vent an unduly active circulation of the liquid between the edge of thefabric and said'plate.

The invention -isillustriited in the accompan 'ng drawing showing onepreferred elnbodlment of the invention, in which drawmg: y

Fig. 'is a vertical\sectional elevation of a 4vat with a spool mouted inplace.

Fig. 2 is an enlarg d view of the'click anddog mechanism. v

Figs. 3 and 4 are front views of an elastic spool core during theformation thereof and upon the finishin thereof respectively.

v Referring to t e drawing and more particularly to Figs. 1 and 2, 1designates the vat, for instance a dyeing digester, provided with acentral conduit 2 and a lateral conduit for causing the circulation inboth directions:

from the centre to the periphery and in op site direction. The conduit'2is connec to the vertical perforated central tube 4 in the vat. 5 is thespool of fabric, formed around. a core 6. Said core is of the elastictype.,

that'is formed' of a. coil spring 6 covered l has a hollow hub member 9fitted on a rod i 10 forming the extension of the centraltube 4. Saidrod is nade`of square or v'circular cross section and formed with rackteeth on its entire length; The rod 10 extends loosely throughs. centralhole in the bottoni of the hub member 9, which carries a series ofv piv-'oted`pawls`11, 11 the noses of which engage the rack 10. As shown inthe example,

' said pawls are preferably displaced with reof tooth, the pawl 11 willengage the corresponding tooth of the rack.'

It will be seen that if the various parts are in the positions shown inFig. 1, the raising of the cap 8 is rendered impossible owing to one ofthe pawls 11V engaging the rack 10. However the lowering of said cap ispermitted and even facilitated by the weight ont said cap. Therefore assoon as under the action of the bath circulating froml the peripheryltothe centre the spool tends to be contracted, the cap 8 will follow suchmove ment and be lowered tov 1/4, 1/2 or more of a tooth, one of thepawls 11 always remaining engaged in order to prevent the cap 8 frombeing moved upwardly upon the reversing of the direction of circulation.Therefore the longer the treatment is continued, the more the cap 8 willhave tendency to be lowered and the more the 'fabric will becornpressed, and what is important the higher will be the resistance tothe passage of the bath between the spool andv plates 7 and 8.

lt will be obvious that it is not necessary that the dierent pawls worlrpreciselv to of tooth as described. According to the caused yto work to1/3, /g

height of the rack teeth, said pawls may be in order to avoid any falsebearing, the cap 8 will be preferably provided, as shown in thedrawings, with a plurality of series of pawls, so that there will alwaysbe at least twc,-three or four pawls in simultaneous enl gagement atpoints which are symmetrically arranged on the periphery of the rack.

As already' described the resistance opposed Il/ar pose set fortlfl.1

etc. of tooth. Again spool of fabric under treatment, a hub mem# berformed on the top of said upper plate, a central hole in the to wall ofsaid hub member, a vertical. rod orrned with rack teeth extending fromthe top of the central perfo- (wrated tube through the central hole inthe top wall of the hub member, series of pawls ivoted on said hubmember and engaging the rack teeth on said rod, said pawls beingarranged in such a way that in any position of the hub member at leastone pawl will engage the rack, whereby the upper plate will be'enabledto be moved downwardly and prevented froxn being moved upwardly, andcircular concentric ribs formed on thel upper side of the lowersupporting plate and the lower side of the upper pressure platerespectively, substantially as and for the pur- 2. ln a device fordyeing, bleaching, sizing and similarly treating fabrics in a spool bymeans of a circulating bath, the combination with a spool of fabricformed around an elas-l tic core comprising acoil spring covered with acontinuous surface formed of a tressing, a lower stationary plate forsupporting ,said spool, an upper, downwardly movable plate provided withpawls preventing upward movement of said plate, said upper and lower tothepassage of the bath between the spool and plates 7 and 8 increaseswith the dura'- tion of the treatment. In order to secure a suiiicientresistance already at the beginning of the treatment, I have providedconcentric ribs 12 on both plates 7 and 8. Under the pressure said ribs12 will be pressed into the spool and thus prevent the liquid frompassing.

Having now fully ldescribed my said in@ vention, what I claim and desireto secure by Letters Patent, is

1. In a device for dyein bleaching, sizing and similarly treating fa ricwound in the shape of'a spool, the combination of a vat, 'a

central perforated tube within said vat, al

conduit connected to said central tube, a second conduit issuinglaterally into said vat, a lower stationary supporting plate for thespool of fabric within the vat, a movable upper pressure plate engagingthe 'top of the

